I just tried to attach a .pdf file.

The board blocked it with "The extension pdf is not allowed."

Is this intentional? What file extensions are allowed?

Go ahead and try it now...

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I'm thinking...

100% sure it works now.

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I'm thinking...

Thanks. Works fine now.

Same problem here, but with .csv and .txt extensions. Can you clarify whether it's by design or a bug?

Not a bug, per se. it's just that there is a whitelist if allowed extensions for uploading. We disallow filed with arbitrary extension types to be uploaded. I don't see harm in csv or txt, so I've whitelisted them.

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it's be happy, not achieve happiness

Is .png disallowed for images ?

Ugh, yes. On iOS, a default screenshot is saved as a .jpg.
But iOS's Photos app's Crop function saves it as .png, which is disallowed for image upload here...

Is there a problem with allowing .png attachment here ?

I haven't had a problem uploading png files. I've posted a few images on my journal in this format.

Hi BlindGroup,

Thanks. Were you using iOS Photos to crop a jpg photo, which became a png on your iOS device -- and you were able to upload it here ?

gif, jpeg, jpg, png, tga, tif, and tiff are the currently allowed image types

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it's be happy, not achieve happiness

They were crops of screen shots in Windows saved as png.

Ed, are you talking about the case of using image tags rather than just "attaching" a png file?

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Dave Sigaty
"Short-lived are both the praiser and the praised, and rememberer and the remembered..."
- Marcus Aurelius; Meditations, VIII 21

Hi Dave, Kirby,

1. iOS Photos app: Crop a screenshot, save it to iOS "Photo Library"
2. L19 > Post Reply > Filename > tap "Choose File" button
3. iOS > iphone "Photo Library" > pick cropped photo from (1)
4. tap "Add the file"
5. Error message: Image file type mismatch: expected extension jpg but extension png given
Screenshot:

What's the filename extension?

Hi Tryss,

It's iOS; files and filenames are not readily shown.
Please see the reproducible steps and error message in post 13.

The error message, raw, uncropped screenshot in post 13 was .PNG.

The iOS Photos cropped photo has an unknown extension, since L19 refuses to upload it ( please see step 5, post 13, of the error message ).

This one off the net is .JPG:

That's why I ask this question : If you're trying to upload a jpg trying to make it pass as a png (or the opposite), the rejection makes sense.

I got the same error message if I rename a .jpg as a .png and try to upload it.

Hi Tryss,

Hmm, thanks. I thought we were past the 1980's DOS era where a filetype was determined by its extension ( which is easier to rename ), and not by its binary "header" bytes ( which is more involved to mess with ). Sigh.
I'm not trying to pass anything as anything else, as the steps show;
but it could be a 'bug' in iOS Photos...

( Looks like nobody else here has experienced this or tried to reproduce the steps on iOS... Oh, well. )

Just followed the steps you gave to post this with my iPhone:


Seems to work. Although, the system seems to have saved the cropped file as a.jpeg. Phone is running iOS 12.

Your post made me wonder if there was a way to change the picture format in iOS. I found this for iOS 11: http://osxdaily.com/2017/09/29/change-i ... jpeg-heif/

Could this be the issue? Maybe L19 is reading the header and confusing the new iOS format for PNG. Unfortunately, these features were changed with iOS 12. So, I couldn't experiment on my phone.

Just to be sure, how about try to email the screenshot to yourself, and see what the extension really is. If you're ambitious, maybe check to see what the header bytes say about the image type (e.g. http://pwet.fr/man/linux/formats/magic).

If it does turn out that L19 is incorrectly identifying the file's proper type, we could modify this, but this part of control is managed by php, and is not a configurable option through phpbb.

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it's be happy, not achieve happiness